Improvement in gage-cocks for steam-boilers



D. JENKINS, Gage-Cooks for Steam-Baileri s.

N- FEFERS. FNOTO-LIYHOGRAPHER, WASHINGTON} C.

UNITED STATES PATENT OFFICE.-

DAVID JENKINS, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALF HIS RIGHT TO JAMES CARSON, OF SAME PLACE.

IMPROVEMENT IN GAGE-COCKS FOR STEAM-BOILERS.

Specification forming part of Letters Patent No. 203,736, dated May 14, 1878 applicationfiled April 12, 1878.

To all whom. it may concern: i

Be it known that I, DAVID JENKINS, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement invGage-Cocks for Steam-Boilers; and I do hereby declare the following to be full, clear, and exact description thereof, reference being had to the accompanying drawing, forming part of this specification, in which- Figure 1 is an elevation, and Fig. 2 alongitudinal section, of a gage-cock embodying my invention.

Like letters refer to like parts wherever they occur.

My invention relates to the construction of gage-cocks for steam-boilers.

In gage-cocks as ordinarily constructed the valveseat is formed on 'the inner end of the tube, and the valveand its seat are consequently both within the boiler. When the waterin the boiler falls below the gage there is a tendency of the sediment to accumulate on the valve and its seat and to corrode the same, giving rise to sticking of the valve, and necessitating the frequent regrinding of both seat and valve. to be ground the whole gage-cock has to be removed, which is always more or less trouble some to do.

The object of thepresent invention is to obtain' such a construction as will avoid the difficulties specified.

I will now proceed to describe my invention, so that others skilled in the art to which it appertains may apply the same.

I11 the drawing, (1 indicates the stem or tube of the gage-cock, threaded on its outer surface, as at a, for insertion in the boiler in the usual manner. The tube a. is enlarged or otherwise properly shaped to form a waterchamber, 12, back of the valve, and is threaded internally, as at c, to receive the valve-section d. dindicates thevalve-seotion, form ed detach- When the valve and seat are able from the stem or tube a, threaded at one end for attachment thereto, and provided with the usual outlet or port 0. The inner end of valve-section d is properly ground to form valve-seat 11, and a valve, m, with stem n extending through valve-section d, is employed.

This valve or may have its stem fluted in the .the boiler, fall below the gage-cock the chamber 12 will retain sufficient to prevent the sediment from collecting or hardening on the valve and seat and corrodin g the same.

When it is desirable to grind the valve-seat or valve, the valve-section d can be unscrewed without removing themain tube (or portion of the gage-cock) a from the boiler, and after repairing it canbe as easily replaced.

Having thus set forth the nature and advantages of my invention, what I claim is- 1. The gage-cock provided with the detachable valve-seat section and valve, the valve andits seat being constructed substantially as described, so that the pressure in the boiler shall keep the valve upon its seat.

2. The gage-cock herein described, having the stem-section a, provided with the waterchamber 12, in combination with the detachable valve-section d and the valve m, the whole constructed and operating substantially as specified.

In testimony whereof I, the said DAVID JENKINS, have hereunto set my hand.

DAVID JENKINS.

Witnesses R. H. WHrrTLEsEY, F. W. BITTER, Jr. 

